Drawing-board



(No Model.) 3 Sheets-Sheetl. D. D. HUYETT.

DRAWING BOARD.

Patented July 10, 1888.

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INVENTOR. 2M2

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(No Model.) 3 SheetsSheet 2. D. D. HUYETT.

DRAWING BOARD.

No. 386,072. Patented July 10, 1888.

INVENTOR.

WITNESSES? 6.15 Win M,

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ATTORNEY.

N, PETERS, Pholo-Ulhngrlphon Washinglon, n. c.

3 Shets-Sheet 3.

(No Model.)

D. D. HUYETT. DRAWING BOARD" Fig.9 Patented July 10', 1888-.

INVENTOH.

WITNESSES:

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N. FEYERS. Pholo-Ulhugraphor, WISH- 10k. n.c.

lhvirnn STATES ATENT tries.

DANIEL D. HUYETT, OF WVAYNESBOROUGH, PENNSYLVANTA.

DRAWING-BOARD.

SPECIFICATION forming part of Letters Patent No 386,072, dated July 10,1888.

(No model.)

To all whom it may concern:

Be it known that I, DANIEL D. HUYETT, a citizen oftheUnited States ofAmerica, residing at \Vaynesborough, in the county of Franklin and Stateof Pr nnsylvania, have invented certain new and useful Improvements inDrawing- Boards,ofwhich the following isaspecification, reference beinghad therein to the accompanying,.dra\vings.

My invention relates to improvements in drawing-boards upon which aruler is controlled partly by cords passing around pulleys pivoted tosaid board; and the objects of my improvements are, first, to permit theguiding of the ruler independently of the edge of the drawingboard;second, to permit the board to be pivotally connected to a framecarrying the ruler and the cord or cords by which the ruler iscontrolled. I attain these objects by the construction illustrated inthe accompanying drawings, in which Figure 1 represents aplan view ofapivoted drawing-board, its supporting-frame, and a ruler constructed inaccordance with my invention. Fig. 2 is a front elevation of a portionof the board, its supporting-frame, and ruler, the latter being raisedup from its working position. Fig. 3 is a plan view, on an enlargedscale,of one end of the ruler. Fig. 4 is a sectional view on line x ofFig. 1 of the pivot of the board and its clamping device. Fig. 5represents in plan view a slightly-modified form of supporting-frame andclamp for the drawing-board with a protractor secured thereto. Fig. 6 isa vertical section on line y 3 of Fig. 5, showing aportion of thedrawing-board and supporting-frame. Fig. 7 is a plan view of a modifiedform of ruler having a double-groove pulley or two pulleys on the sameshaft at each end, in place of having said pulleys side by side, as inthe other figures. Fig. 8 is a side elevation of the same ruler andpulleys. Fig. 9 is a plan view of the improved ruler attached to anordinary drawing-board. Fig. 10 is a sectional view of one end of saidboard, showing one of the cord-clamps in elevation. Fig. 11 is asectional view of one end of said board with a portion of the ruler inelevation.

In said drawings, A represents a ruler having mounted thereon near eachextremity a pair of grooved pulleys, B, either side by side onindependent pivotpins or one above the other upon the same pin. Theruler rests upon the drawing-board G, and around each of the pulleys Bpasses a cord or cords, D, that extend lengthwise of the ruler and areprotected by a handle bar, a, secured to the top of said ruler. The bara is gained out or recessed on its under side to allow the cords tocross each other thereunder. The board 0 in Fig. 1 is pivotallyconnected to the frame G, which is preferably formed of two barscrossing each other in their center in the form of the letter X, toallow the draftsman free access to the sides of the board. This frame Gis strength ened and stiffened by having the ends of its bars united byparallel bars H, that project above the plane of the face of the board Csuf ficiently to form guides for the pulleys B, and

thus prevent the ruler A from having an un I necessary amount ofend-play. It will be noticed that when the ruler is moved up and downupon the board all the pulleys will roll on the cords in the samedirection, so that when they touch either one of the guide-bars H itoffers no frictional resistance, but is simply a backing for the cord.The ends of said cord are secured to the parallel bars II by means ofclamps E, consisting, preferably, of two small plates, (2 6 betweenwhich the cord is received, and said plates are retained con nccted tothe bars H by means of a screw, 0", and asteady-pimc, passing throughsaid plates. A single cord may be used, as shown in Fig. 9; but I preferto use two, as shown in Figs. 1 and 5, to permit better access to theboard from the sides.

The drawing-board, if of small size, may be made of a central thin slabof soft wood secured byscrews to theinclosing-frame 0, (shown by dottedlines in Fig. 1;) but forlarge boards the central portion may be securedto the in closing-frame by turn-buttons or by other wellknown means, sothat if the frame is provided with a scale of degrees their size willnot be affected by any expansion or contraction of the central board.

To pivot the drawing-board to its supporting-frame, said board isprovided in its central portion, as shown in Fig. 4, with a plate, K,secured to the bottom thereof, and said plate has a central socket toreceive the pintle Z of a plate, T1, screwed to the top of the frame G,and a circular flange, K, by which it is retained connected to the plateL by means of a board to be laid and rest evenly on a table when removedfrom the frame G, as it is sometimes desirable to use it as an uprightdrawing-board. The bars H in Fig. 1 are sufficiently far apart to permitthe board to be revolved without having its corners comein contact withsaid bars. The board has its edge provided with a scale of degrees fromzero to ninety degrees, running from left to right and from right toleft, and the frame G has marked thereon two guide-lines, g, divergingfrom the center. y

In the modified form shown in Figs. 5 and 6 the bars H are placed closertogether and elevated above the frame G by means of blocks h, so as topermit the corners of the board to pass under them. To the edge of saidboard is secured a Vernier, V, and to the top of the frame G is secureda protractor, P, the periphery of which passes under the Vernier, at dis also received by guiding-buttons m, secured to the under side of theboard, that retain said board and the frame G adjustably connected.

In Figs. 9and 11 the ruler is shown provided adjacent to its ends withguide-rolls F, in addition to its guide-cord and pulleys, to limit itsend motion by hearing against the edge of the board or its end bars. 7

Having now fully described my invention, I claim- 1. The combination ofa ruler, a drawingboard, and a cord having its ends clamped or fixed andpassing around pulleys secured to said ruler near its ends,substantially as and for the purpose described.

2. The combination of a drawing-board, a ruler having apair of pulleyssecured near each end, and a cord having fixed ends and passinglengthwise of said ruler, substantially as and for the purposedescribed.

3. The combination of a frame carrying a ruler, and a cord, with adrawing-board pivotally connected to said frame, for the purposedescribed.

4. The combination of a frame, a drawing board pivotally connected tosaid frame,a ruler carried thereby, and a cord connecting the ruler andframe, for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

DANIEL D. HUYETT.

Vitnesses:

D. B. RUssELL, ALF. N. RUssELL.

